Changelog for aivika-5.3

Version 5.3

Introduced the result source titles, which can be useful when plotting the charts.

Added functions newSignalInTimeGrid and timeGrid.

Version 5.2

Significantly improved in the examples the speed of simulation after using
the mwc-random package by Bryan O'Sullivan for generating random numbers.
It was possible to use custom random number generators before, but now
the mentioned generator is used by default. Also the type signature of
the SimpleGeneratorWithSeed data constructor has changed.

Version 5.1.1

Updated the pure-functional priority queue so that the events could be yielded
in the distributed simulation module too.